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OpenMOCA™

An open standard for portable grounding for AI that packages knowledge with its structure and original sources

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OpenMOCA™ is an open standard for packaging knowledge with its structure and original sources for AI systems, enabling retrieval-augmented generation with

What it is

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openmoca.org, as visitors see it

OpenMOCA™ is an open standard for portable grounding for AI that packages knowledge with its structure and original sources. A MOCA package carries the knowledge an AI system answers from, how it is organized, and the original sources it came from, sealed by one digest and optionally signed. Open Readers in TypeScript, .NET and Python read, verify, search and cite packages the same way, on a server or offline, enabling retrieval-augmented generation with checkable citations.

MOCA stands for Modular Ontology, Content & Attestation: knowledge in modular packages organized by an optional ontology, with attestations and signatures proving who published and checked it. The standard provides a way for any model, vector store or agent framework to ground on the same knowledge while maintaining trust and provenance.

What it is built with

  • Modular knowledge packages with optional ontology structure
  • Readers in TypeScript, .NET and Python for consistent package interpretation
  • RAG with verifiable citations and provenance tracking
  • Signed packages and reviews for trust verification
  • Sidecar indexes with lexical and semantic search
  • Agent framework integrations including LangChain and LlamaIndex

Pricing

Pricing model: Open source

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OpenMOCA™ metrics

Majestic link data for openmoca.org. Arrows show the change since the previous check.
MetricValue
Trust Flow0 no change since last check
Citation Flow0 no change since last check
Referring domains0 no change since last check
External backlinks0 no change since last check

Majestic benchmarked 11 Nov 2026, rebuilt 11 Nov 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

OpenMOCA™ domain build sheet

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Public RDAP record, last read 11 Nov 2026, 12:50 UTC.
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Questions from the bench

What does MOCA stand for?
MOCA stands for Modular Ontology, Content & Attestation: knowledge in modular packages that can be assembled into larger ones, organized by an optional ontology, with attestations and signatures that prove who published it and who checked it.
Is MOCA a vector database?
No. A package is a file format for knowledge and a Reader is a library that reads it. Search can run over the package's own text, over a sidecar index of vectors built for it, or through your own vector database, with the Reader applying the same trust rules to each.
Is MOCA an alternative to RAG?
No. It is what you put into retrieval-augmented generation (RAG). A MOCA package gives a RAG pipeline knowledge with its version, its structure and its sources, so every answer can cite a passage that can be checked, and content that is out of date or for another audience is left out before the model sees it.
Can it run offline, or on infrastructure we control?
Yes. Readers are libraries that run in your process and never reach the network because a package names something. A package carries its sources, so quotes are checked offline, and signatures are verified against keys you list. Lexical search needs nothing else; semantic search needs only an embedding model you run yourself.
Is it free, and who is behind it?
Yes. The specification, Readers and tools are open source under Apache-2.0. OpenMOCA™ is maintained by PI & Mash Solutions Ltd, which holds the OpenMOCA™ trademark on behalf of the project.

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